package com.openvas.core.gas.mqtt.until;

import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.eclipse.paho.client.mqttv3.MqttTopic;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
@Component
public class MqttClientUntil {
	@Value("${MQTT.host}")
	public String HOST;
	@Value("${MQTT.topic}")
	public String TOPIC;
	@Value("${MQTT.clientid}")
	private String clientid;
	private MqttClient client;
	private MqttConnectOptions options;
	@Value("${MQTT.userName}")
	private String userName = "guest";
	@Value("${MQTT.passWord}")
	private String passWord = "guest";
	@Value("${MQTT.qos}")
	private Integer qos = 1;
	private MqttMessage message;

	public void start(String msg) {
		try {
			// host为主机名，clientid即连接MQTT的客户端ID，一般以唯一标识符表示，MemoryPersistence设置clientid的保存形式，默认为以内存保存
			client = new MqttClient(HOST, clientid, new MemoryPersistence());
			// MQTT的连接设置
			options = new MqttConnectOptions();
			// 设置是否清空session,这里如果设置为false表示服务器会保留客户端的连接记录，这里设置为true表示每次连接到服务器都以新的身份连接
			options.setCleanSession(true);
			// 设置连接的用户名
			options.setUserName(userName);
			// 设置连接的密码
			options.setPassword(passWord.toCharArray());
			// 设置超时时间 单位为秒
			options.setConnectionTimeout(10);
			// 设置会话心跳时间 单位为秒 服务器会每隔1.5*20秒的时间向客户端发送个消息判断客户端是否在线，但这个方法并没有重连的机制
			options.setKeepAliveInterval(20);
			// 设置回调
			client.setCallback(new PushCallback());
			MqttTopic topic = client.getTopic(TOPIC);
			// setWill方法，如果项目中需要知道客户端是否掉线可以调用该方法。设置最终端口的通知消息
			options.setWill(topic, "close".getBytes(), 2, true);
			client.connect(options);
			message = new MqttMessage();
			message.setQos(qos);
			message.setRetained(true);
			message.setPayload(msg.getBytes());
			client.publish(TOPIC, message);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				client.close();
			} catch (MqttException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

		}
	}

	public static void main(String[] args) throws MqttException {
	
	}
}